.firstUse {
  height: 100%;
  width: 100%;
  background: #000;
}
.firstUse .swiper-slide {
  background: #000;
}
.firstUse .page1 img {
  position: absolute;
}
.firstUse .page1 img:nth-child(1) {
  height: 3rem;
  left: 15%;
  bottom: 1%;
}
.firstUse .page1 img:nth-child(2) {
  height: 1.6rem;
  top: 2%;
  right: 2%;
}
.firstUse .page1 img:nth-child(3) {
  height: 2.5rem;
  bottom: 5%;
  left: 5%;
}
.firstUse .page2 img {
  position: absolute;
}
.firstUse .page2 img:nth-child(1) {
  height: 1.2rem;
  left: 2%;
  bottom: 2%;
}
.firstUse .page2 img:nth-child(2) {
  height: 3rem;
  top: 15%;
  right: 1%;
}
.firstUse .page2 img:nth-child(3) {
  height: 1rem;
  top: 5%;
  right: 5%;
}
.firstUse .page3 img {
  position: absolute;
}
.firstUse .page3 img:nth-child(1) {
  height: 1.5rem;
  top: 2%;
  left: 2%;
}
.firstUse .page3 img:nth-child(3) {
  height: 3rem;
  top: 10%;
  left: 50%;
  transform: translateX(-50%);
}
.firstUse .page3 img:nth-child(2) {
  height: 5rem;
  top: 8%;
  left: 50%;
  transform: translateX(-50%);
}
.firstUse .page4 img {
  height: 100%;
  width: 100%;
}
